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Fail a compliance task

The tasks.fail operation: POST /api/v1/tasks/{id}/fail in the REST API and the tasks_fail tool in the MCP server.

POST/api/v1/tasks/{id}/fail

Records that a task couldn't be done, with a reason (for example: the portal refused the application, a document is missing). The task becomes failed (task.failed) and its lease ends. With retryAt, it opens again on that date, unassigned, for another attempt; without one, it stays failed.

Failing a task doesn't change the obligation: a registration's deadline escalations and automatic block continue (spec §10.3), and a filing period stays due. While someone holds the task's lease, only they can fail it.

At a glance

  • REST: POST /api/v1/tasks/{id}/fail
  • MCP tool: tasks_fail
  • Operation ID: tasks.fail
  • Scope: Organization, or one of its legal entities or brands
  • Permission: tasks:write
  • Risk tier: write
  • Dry run: Supported (send Ownrecord-Dry-Run: true)
  • Idempotency: Idempotency-Key required
  • Modes: Test and live
  • Authentication: API key with the tasks:write scope
  • Since: M10

Request

Path parameters

FieldTypeDescription
idtask_… ID

Body

A JSON object (Content-Type: application/json):

FieldTypeRequiredDescription
reasonstringYesWhy the task couldn't be done. Data, shown to people and agents.
retryAtdate-timeNoWhen the task opens again for another attempt (ISO 8601, in the future).
expectedVersioninteger (at least 1)No

Response

200 OK with a JSON object:

FieldTypeDescription
idtask_… ID
object"task"
typeone of 12 values, e.g. registration.prerequisites, registration.prepare, registration.submit (all in the OpenAPI document)
entityIdent_… ID
livemodeboolean
regimeIdstring or null
registrationIdregn_… ID or null
filingPeriodIdfp_… ID or null
prerequisiteCodestring or null
titlestring
descriptionstring or null
priorityone of low, normal, high, urgent
statusone of open, claimed, in_progress, awaiting_approval, done, failed, cancelled
reasonone of 11 values, e.g. auto_blocked, existing_customer_sale, prerequisite_open (all in the OpenAPI document) or null
dueAtdate-time or null
overdueboolean
assigneeobject or null
claimedUntildate-time or null
leaseActiveboolean
completeWithone of tasks.complete, tasks.submit
needsAuthorizationboolean
inputsarray of object
inputs[].kindstring
inputs[].fileIdfile_… ID or null
inputs[].dataobject or null
outputsobject or null
authorizationIdatz_… ID or null
approvalRequestIdapr_… ID or null
failureobject or null
checklistarray of object
checklist[].textstring
checklist[].doneboolean
createdAtdate-time
updatedAtdate-time
completedAtdate-time or null
completedBystring or null
versioninteger (at least 1)

Examples

The portal is down; try again tomorrow

HTTP
POST /api/v1/tasks/task_01m4ttwd3veh9apbewxheq5xa9/fail
Authorization: Bearer or_test_…
Idempotency-Key: 3f1c9a52-7d0e-4b8f-9a61-0c2d5e8b7f14
Content-Type: application/json

{
  "reason": "The OSS portal returns a maintenance page.",
  "retryAt": "2026-10-16T08:00:00.000Z"
}

Response (200):

JSON
{
  "id": "task_01m4ttwd3veh9apbewxheq5xa9",
  "object": "task",
  "type": "filing.submit",
  "entityId": "ent_01m4ttwd3veh9apbewxheq5xh4",
  "livemode": true,
  "regimeId": "EU_OSS_UNION",
  "registrationId": "regn_01m4ttwd3veh9apbewxheq5xa8",
  "filingPeriodId": "fp_01m4ttwd3veh9apbewxheq5xa7",
  "prerequisiteCode": null,
  "title": "File the One-Stop Shop, Union scheme 2026-Q3 return",
  "description": "File the One-Stop Shop, Union scheme 2026-Q3 return with the authority using the filing package, by 2026-10-31. Then submit this task with the return's reference, the portal's confirmation and the authorization you acted under: the period becomes submitted.",
  "priority": "high",
  "status": "failed",
  "reason": "period_ended",
  "dueAt": "2026-10-31T22:59:59.000Z",
  "overdue": false,
  "assignee": {
    "type": "agent",
    "id": "agt_01m4ttwd3veh9apbewxheq5xa6"
  },
  "claimedUntil": null,
  "leaseActive": false,
  "completeWith": "tasks.submit",
  "needsAuthorization": true,
  "inputs": [
    {
      "kind": "filing_period",
      "fileId": null,
      "data": {
        "filingPeriodId": "fp_01m4ttwd3veh9apbewxheq5xa7",
        "regimeId": "EU_OSS_UNION",
        "periodKey": "2026-Q3",
        "dueDate": "2026-10-31",
        "dueAt": "2026-10-31T22:59:59.000Z"
      }
    },
    {
      "kind": "filing_package",
      "fileId": null,
      "data": {
        "filingPeriodId": "fp_01m4ttwd3veh9apbewxheq5xa7"
      }
    },
    {
      "kind": "playbook",
      "fileId": null,
      "data": {
        "regimeId": "EU_OSS_UNION",
        "playbookKind": "filing"
      }
    }
  ],
  "outputs": null,
  "authorizationId": null,
  "approvalRequestId": null,
  "failure": {
    "reason": "The OSS portal returns a maintenance page.",
    "retryAt": "2026-10-16T08:00:00.000Z",
    "failedAt": "2026-10-15T09:28:00.000Z",
    "failedBy": "agt_01m4ttwd3veh9apbewxheq5xa6"
  },
  "checklist": [
    {
      "text": "Download the filing package",
      "done": false
    },
    {
      "text": "File the return in the authority's portal",
      "done": false
    },
    {
      "text": "Submit this task with the reference, the confirmation and the authorization",
      "done": false
    }
  ],
  "createdAt": "2026-10-01T00:23:00.000Z",
  "updatedAt": "2026-10-15T09:28:00.000Z",
  "completedAt": "2026-10-15T09:28:00.000Z",
  "completedBy": "agt_01m4ttwd3veh9apbewxheq5xa6",
  "version": 3
}

Errors

CodeHTTP statusWhenWhat to do
validation_failed400No reason, or retryAt isn't in the future.Fix the fields listed in details.issues and send the request again.
resource_not_found404No task with this ID in this organization, entity and mode.Check the ID and that your credentials are scoped to the right organization, entity, brand and mode.
task_status_invalid409The task is finished, or it waits for an approval.Reload the task: finished tasks (done, failed, cancelled) don't change, and a task waiting for an approval changes only through that approval. details.status is the task's status.
task_claimed409Someone else holds the task's lease.Work on another task (tasks.list with claimable: true), or try again after details.claimedUntil: an expired lease frees the task. details.assignee is who holds it.
version_conflict409The task changed since expectedVersion, or at the same moment.Fetch the object again and retry the change.
permission_denied403You can't work on compliance tasks here.Ask an organization owner or admin for a role or scope that allows this action.

It can also return these common errors: api_version_unsupported, invalid_json, unsupported_media_type, authentication_required, api_key_invalid, idempotency_key_required, idempotency_key_reused, idempotency_in_progress, approval_required, approval_rejected, approval_expired, stale_approval, approval_policy_denied, rate_limited, internal_error.